/**
 ******************************************************************************
 *
 * @file       treewidgetcolumnstretcher.cpp
 * @author     The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
 *             Parts by Nokia Corporation (qt-info@nokia.com) Copyright (C) 2009.
 * @brief
 * @see        The GNU Public License (GPL) Version 3
 * @defgroup
 * @{
 *
 *****************************************************************************/
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include "treewidgetcolumnstretcher.h"
#include <QTreeWidget>
#include <QHideEvent>
#include <QHeaderView>
using namespace Utils;

TreeWidgetColumnStretcher::TreeWidgetColumnStretcher(QTreeWidget *treeWidget, int columnToStretch)
    : QObject(treeWidget->header()), m_columnToStretch(columnToStretch)
{
    parent()->installEventFilter(this);
    QHideEvent fake;
    TreeWidgetColumnStretcher::eventFilter(parent(), &fake);
}

bool TreeWidgetColumnStretcher::eventFilter(QObject *obj, QEvent *ev)
{
    if (obj == parent()) {
        if (ev->type() == QEvent::Show) {
            QHeaderView *hv = qobject_cast<QHeaderView *>(obj);
            for (int i = 0; i < hv->count(); ++i) {
                hv->setSectionResizeMode(i, QHeaderView::Interactive);
            }
        } else if (ev->type() == QEvent::Hide) {
            QHeaderView *hv = qobject_cast<QHeaderView *>(obj);
            for (int i = 0; i < hv->count(); ++i) {
                hv->setSectionResizeMode(i, i == m_columnToStretch ? QHeaderView::Stretch : QHeaderView::ResizeToContents);
            }
        } else if (ev->type() == QEvent::Resize) {
            QHeaderView *hv = qobject_cast<QHeaderView *>(obj);
            if (hv->sectionResizeMode(m_columnToStretch) == QHeaderView::Interactive) {
                QResizeEvent *re = static_cast<QResizeEvent *>(ev);
                int diff = re->size().width() - re->oldSize().width();
                hv->resizeSection(m_columnToStretch, qMax(32, hv->sectionSize(1) + diff));
            }
        }
    }
    return false;
}
